Oil-burning furnace



A. J. BOBENER. OIL BURNING FURNACE- APPLICATION FILED MAY 21, I919- Patented J an. 13, 1920.

3 SHEETSSHEEI I.

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OIL BURNING FURNACE.

APPLICATION FILED MAY 27, 1919- 132 975, Patented Jan. 13, 1920.

' 3 SHEETSSHEET 3- WZZa/vzeys ALBERT J. BORENER, OF CHICAGO, ILLINOIS.

OIL-BURNING FURNACE.

essors.

Specification of Letters Patent.

Patented Jan. 13,1920.

Application filed May 27, 1919. Serial No. 300,101.

To all whom it may concern:

Be it known that I, ALBERT J. BORENER, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Oil-Burning Furnaces, of which the following is a specification.

This invention has reference to furnaces of the type disclosed in Letters Patent No. 1,230,657, granted to me June 19, 1917, and one object of the present invention is to improve the construction and increase the efficiency of the means for controlling the admission of air and oil to the furnace. Another object of the invention is to provide simple and eflicient means for protecting the workmen from the dangerous efiect of escaping burning gases, and a still further object of the invention is to catch the escaping burning gases and return the same to the fire box or combustion chamber of the furnace. Other incidental objects of the invention will appear as the description proceeds and the'novel features will be pointed out in the claims following the description.

The present invention is illustrated in the accompanying drawings, in which- Figure 1 is an end view of one embodiment of the invention;

Fig. 2 is a side elevation of the same;

Fig. 3 is a longitudinal. sectional elevation of the air and oil controlling mechanism;

Fig. 4: is a detail horizontal section on the line 41 of Fig. 3;

Fig. 5 is a detail section on the line 55 of Fig. 2;

Fig. 6 is a detail horizontal section on the line 66 of Fig. 3.

In the drawings, the reference numeral 1 indicates a plate or rivet-heating furnace which is supported upon a suitable frame 2 and is provided in one side with openings 3 in the usual manner through which the progress of the work may be observed and through which excess gases ordinarily escape. The furnace is also provided with a small opening 4 near its front end through which suitable means may be inserted to ignite the fuel in the fire-box or combustion chamber. Air is supplied to the combustion chamber through an air blast pipe 5 having a goose neck terminal 6 and from which a branch 7 leads to one side of the furnace in the manner more specifically set forth in my aforesaid Letters Patent. In the present invention, the oil is supplied through a fuel pipe 8 which is disposed below the air conduit 9 leading from the terminal of the goose neck 6 under the furnace and into the fire-box of the same, the fuel supply pipe 8 being provided With a cutoff valve 10 and constructed with a horizontal branch 11 disposed immediately below the air conduit 9 and terminating in a burner which is disposed within the firebox as will be readily understood, but the said burner is not illustrated herein as it maybe of any practical type and forms'no part of my present invention. The air blast pipe is also provided with an automatic damper 12 in the goose neck 6 whereby gases which may be generated prior to the admission of air will be automatically vented and prevented from passing back into the air blast pipe and producing an explosion. This automatic damper 12 is illustrated only conventionally herein inasmuch as it is fully disclosed in my aforesaid patent and its construction is not a part of my present improvements.

The branch air pipe 7 is turned upwardly at the side of the furnace and near the front end thereof to lead into a T-ooupling l3 and immediately below the said coupling a sliding damper or cut-0E 14 is interposed in the said branch air pipe whereby the flow of air may be regulated. From the upper terminal of the T-coupling 13 rises a nipple or short tube 15, the upper end of which is closed by a cap 16 and in the rear side of which I provide a plurality of perforations or openings 17 From the rear side of the coupling 13 a pipe or tube 18 extends rear wardly parallel with the side of the furnace and is provided in its upper side wlth openings 19 which are located immediately adjacent the openings 3 in the furnace whereby air escaping through said openings 19 will pass upwardly across the openings 3 and thereby carry the burning escaping gases upwardly as will be readily understood.

. and the openings 3. T he upper end H tube or pipe 21 15 connected by a coupling The rear end of the pipe or tube 18 is connected by a coupling 20 with an upstanding tube or pipe 21 having openings 22 in its front side, and it is to be noted that the said openings 22 as well as the openings 17 are inclined upwardly so that the air escaping therethrough will ascend and mingle'with the air and gases rising from the tube 5.8 f tie 23 with a return auxiliary flue 24 which is disposed at the top of the furnace and along the side of the same and communicates at its front end with a lateral flue 25 which passes across the end of the furnace and has its terminal 26 directed into an opening in the wall of the furnace whereby the air blast will be delivered in the upper portion of the combustion chamber or lire-box. In'the under side of the auxiliary flue 24; are deflect ing openings 27 whereby the currents rising from the several tubes will be caused to enter the flue while flowing in a general forward direction and be thereby directed toward the front of the furnace to mingle with the currents within the flue without causing e dies or checking the flow. On the upper side of the flue 2a are openings 28 which form vents for the same and also serve to permit fresh air to be drawn into the flue by'the suction of the flow through the same. Below the said auxiliary flue, invetted U-shaped brackets 29 are secured to the wall of the furnace, which brackets serve to support the auxiliary flue, shown clearly in Figs. 1 and 5, and have secured to their outer ends the inner members 30 of shields or guards which prevent the workmen falling or otherwise coming in contact with the side of the furnace and being thereby burnt or otherwise injured. The guard members 30 are spaced from the side of the furnace, as clearly shown, so that a passage is provided through which the ieated currents may rise to enter the auxiliary flue and in which there will be a suiiicient suction created to hold the escaping gases and flames close to the wall of the furnace and thereby minimize the liability of accident, besides holding the heat to the furnace so that the'desired temperature will be maintained without an excessive consumption of fuel. As an additional protection to the workmen, I provide an outer guard or shield member 31 which is disposed in spaced relation to the inner guard 30 and extends up to a point near the top of the auxiliary flue so that a space will be provided between the two shield members or guards through which the outer air may circulate and thereby diminish the radiation of heat from the inner guard 30 so that, should a workman app"oach too close to the furnace, contact with the not guard member 30 will be pre vented by the outer cooler shield 31. On the inner face of the outer shield is secured a lining 31 of asbestos or other heat-resisting material. The guard members are held in spaced relation to each other and to the furnace by spacing sleeves 32 fitted around the securing bolts 33 which are inserted through the furnace wall, the brackets 29, and the guards, as clearly shown.

In my present invention, the oil pipe is disposed directly below the air blast conduit,

as previously stated and as shown clearly in Fig. 3, and, to support the horizontal member of the fuel pipe in fixed relation to the furnace and the air blast conduit, I provide a depending lug 3% on the lower end of the wind gate casing 35 and to the extremity of said lug I secure a hanger 36 through which the fuel supply pipe passes, as shown. The wind gate casing 35 is secured in any convenient manner in the clownturned terminal of the goose neck 6 and has an open endwhich receives the rotary substantially cylindrical wind-gate 37, and in the outer wall of the casing 35 is a slot 38 through which the handle 39 of the windgate projects and plays. The said handle has threaded terminal which is engaged in the wind-gate body, as shown clearly in Fig. 3, and its outer portion constitutes a grip member 40 which is disposed somewhat .below the plane of the threaded terminal, the intermediate portion of the handle member being downturned to provide a fulcrum support for the latch 41 which has its outer portion disposed approximately over the grip member 40 and has its inner extremity formedv into a dog or pawl 42 adapted to engage in one of a plurality of notches 43 provided on the arcuate pro]ection or rib 4 1 on the outer surface of the-casing 35, the said notches or recesses being disposed in alinement with the respective graduations of a scale a5 provided on the outer surface of the casing immediately above the slot 38. By engaging the dog or pawl 42 in the proper notch or recess, the wind-gate may be set so as to partially or entirely cut-off the flow of air through the conduit 9 and thereby accurately regulate the fiow of air to the combustion chamber. When the wind-gate has been brought to a set position, the latch 41 will effectually hold it in that position so that the volume and force of the air blast will be uniform as it enters the combustion chamber notwithstanding any possible variations in the blast at its source. On the bottom of the wind gate at the axis of rotation of the same is a notched or recessed lug 16 which fits over the handle or cross head 17 of the stem 48 of a turning plug valve ber will be constant and the flow of oil automatically diminished as the flow of air is diminished and vice versa. Upon referring to Fig. 6, it will be noted that the port or passage 50 through the plug 49 is constricted at its center and its walls diverge in both directions from its center toward its ends so that, while the plug may be turned so as to entirely cut-off the flow of oil, in all open positions of the valve the flow of oil will be partially choked or retarded as it enters the valve and expansion of the oil will be permitted as it leaves the valve so that the oil will be very readily vaporized when it mingles with the air on issuing from the burner.

From the foregoing description, taken in connection with the accompanying drawings, it will be seen that I have provided very simple but effectual means for protecting the workmen against dangerous contact with or approach to the furnace and have provided means whereby the escaping flames and gases will be drawn back and delivered into the furnace so that they will not be wasted. This operation reduces the quantity of fresh fuel needed to maintain combustion in the furnace and keep up the de sired temperature of the same. It will also be noted that I have provided very simple and efiectual means for regulating and con trolling the flow of air and oil to the furnace so that a single operation will set both the air controlling and the oil controlling members, the result being a saving in the time necessary to adjust the devices and also a saving in the quantity of fuel needed.

Should there be a leakage of oil from the burner through some accident or other uncontrollable circumstance, it will not pass back through the air blast pipe or accumulate at the wind-gate but will escape through an opening 51 provided in the bottom of the wind-gate for that purpose.

Having thus described the invention, what is claimed as new is:

1. In a furnace of the character set forth, the combination of an air supply conduit, a fuel supply pipe extending parallel with the air supply conduit and exterior thereto, valves housed-in and extending across the conduit and the pipe respectively and disposed in axial alinement, connections be tween said valves whereby they will be simultaneously operated, and means connected with one of the valves for adjusting the same.

2. In a furnace of the character set forth, the combination of an air supply conduit, a fuel supply pipe, a rotary wind-gate disposed in the conduit, a rotary valve mounted in the fuel supply pipe on the axis of rotation of the wind-gate and below the wind-gate, a recessed lug on the lower end of the Wind-gate engaging over the end of said valve, and a handle member projecting laterally from the wind-gate.

. 3. Ina furnace of the character set'forth, the combination of an air supply conduit, an outstanding rib on said conduit provided with a plurality of recesses, a wind-gate ro tatably mounted within the said conduit to control the flow through the same, a handle member secured to said wind-gate and projecting through the conduit and over the said rib, and a latch yieldably mounted upon the said handle member and arranged to engage any one of said recesses.

4. In a furnace of the character set forth, the combination of an air blast conduit, a rotary wind-gate mounted therein, a hanger secured to the conduit below the same, a fuel supply pipe supported by said hanger, a valve in said pipe operatively connected with the wind-gate, and means for simultaneously adjusting the wind-gate and said valve.

5. In a furnace of the character set forth, the combination with a main air blast con-' duit, and means for controlling the flow of air therethrough, of a branch leading from said conduit and disposed adjacent the side of the furnace, means for controlling the flow through said branch, and an auxiliary flue leading from said branch to an end of the furnace and communicating through the end of the furnace with the combustion chamber thereof.

6. In a furnace of the character set forth, the combination with a furnace having openings in its side, of an air supply pipe disposed adjacent the side of the .furnace and consisting of a plurality of communicating and connected tubes having openings in their sides directedtoward the said openings, an auxiliary flue leading from one end of said air supply pipe into the combustion chamber of the furnace and provided with openings in its sides whereby to receive the currents flowing from the openings in the air supply pipe and in the side of the furnace.

- 7. The combination with a furnace, of an 'air supply conduit disposed at the side of the furnace and extending through one wall thereof into the combustion chamber of the same, and a shield disposed in' spaced relation to the side of the furnace and laterally therefrom beyond the said airsupply conduit whereby escaping gases at the side of the furnace will be directed into an upper portion of said conduit and returned to the combustion chamber of the furnace.

8. The combination with a furnace haw ing openings in its sides, of an air supply pipe disposed adjacent the openings in the side of the furnace and entering an end of the furnace, and inner and outer guard members securedupon'the side of the furnace in spaced relation to the furnace and to each other, said members being disposed laterally beyond the air supply pipe and said air supply pipe being provided with 5 openings directed toward the openings in the side of the furnace whereby escaping gases will be returned tothe furnace.

9. The combination with a furnace having'openings in its sides, of means on the side of the furnace for catching hot gases escaping from the openings in the sides of 10 the furnace and returning said gases to the combustion chamber of the furnace.

In testimony whereof I aflix my signature.

ALBERT J. BORENER. 1 3. 

